Investigators are looking into posts on gun message boards and
edits to Wikipedia entries suggesting Connecticut school shooter
Adam Lanza may have studies previous massacres,
The Hartford Courant reports.

The postings from 2009 and 2010 — which authorities suspect are
Lanza's — reveal his obsession with guns and with other mass
shootings. With a user name that authorities have not revealed
but is believed to be Lanza's, he edited the Wikipedia entry for
a 1988 massacre that has eerie parallels to the Sandy Hook
Elementary School shooting.

They both shot through the front doors of the target of their
attacks.

They both used high-powered assault weapons during the
attacks.

The Courant
reports:

The poster
believed to be Lanza delves deeply into Wikipedia's account of
the ESL shooting, revising it on at least four occasions in
February 2010 and adding such details as the caliber and
manufacturer of weapons in Farley's arsenal.